"is (s)he actually having fun (when solving challenging problems)" I don't know about anyone else, but for me personally, it's a bit difficult to have fun when

"is (s)he actually having fun (when solving challenging problems)" I don't know about anyone else, but for me personally, it's a bit difficult to have fun when I'm unemployed and need a paycheck. You might even say that interviews are testing for how financially secure you are. You can only truly relax during a job interview if you don't actually need the job.